Give a look, if you'd be so kind, to the 3style table.
Pretty cool I think--but rest assured I'm not trying to sell you one, nor even recreate it.
What has me interested though is the fastening hardware used in breaking down and assembling this piece: something that is NOT done once upon initial assembly, but rather is an integral part of changing the piece's configuration as part of its regular use. I could see finding use for the keyhole type fastener used in this piece in other designs.
This keyhole type hardware...the designer claims to make his own version of the female side of this assembly. That's fine as I've had no problem locating sellers of same online--even if shaped somewhat differently.
It's the male side: the pin, that' been a challenge for me to locate---any idea where this can be found? In my mind, this probably has wood screw threading. And in the designer's words, his pins are spring loaded---although I suspect that may not be (??) as important for me.
At least for me, and as of this writing, my browser renders rows of thumbnail images at the aforementioned link, whose second row middle image shows this hardware well.
Oh--comment on the table. Although I haven't studied it up close, I might have been inclined to add this hardware to the long face of 1 side of each of the boards--or use the existing hardware that's already there to effect its existing applications, to allow the boards to sit on top of each other without moving, when the DINING (not coffee) table is in its small state. This beats having to put the other leaf "in the closet," IMHO, when the table is in this configuration.